A V-type automatic pulp proportioning valve

Abstract

The present invention provides a V-type automatic slurry mixing valve, which relates to the technical field of hydropower and water conservancy projects. The V-type automatic slurry mixing valve comprises a valve body (8), a density valve core (2) and a flow valve core (5). A newly mixed slurry chamber (7) is arranged inside the valve body. Cement slurry original slurry chambers (1) and water chambers (3) are further arranged at both ends of the valve body. The cement slurry original slurry chambers (1) and the water chambers (3) are both located above the newly mixed slurry chamber (7). The density valve core (2) is installed inside the valve body (8) and is located between the cement slurry original slurry chambers (1) and the water chambers (3). The density valve core (2) is connected with a density servo motor (4). The flow valve core (5) is installed inside the newly mixed slurry chamber (7), and the flow valve core (5) is connected with a flow servo motor (6). The present invention can realize the real-time and appropriate preparation of the required specific gravity grade cement slurry amount during grouting, meet the real-time needs of slurry specific gravity grade transformation, and reduce cement waste.

Description

Technical Field

[0001] The present invention relates to the technical field of hydropower and water conservancy projects, and particularly relates to a V-shaped automatic slurry mixing valve. Background Art

[0002] During the grouting process of hydropower and water conservancy projects, it is necessary to timely change the water-cement ratio of the cement slurry (each water-cement ratio corresponds to a density value) according to the change of the cement slurry injection rate (unit: L / min), grouting pressure, grouting time, and slurry injection volume (unit: L). At the grouting working face, the upper barrel of a double-layer grouting barrel is usually used for slurry preparation. The pipeline for transporting the original slurry (water-cement ratio about 0.5:1) from the centralized slurry preparation station is placed into the upper barrel of the double-layer grouting barrel, a certain amount of the original slurry is put in, and then the corresponding proportion of water is put in from the water pipeline. The two are mixed to form the required new slurry. The addition amounts of the original slurry and water are intermittent, and the addition amounts can be controlled by weighing.

[0003] Patent CN201721770774.8 discloses a weighing type slurry mixing barrel, which includes a base, a fixed column, a stirring device, a slurry storage barrel, a liquid level sensor, a weighing sensor, and a slurry mixing barrel fixed on the base. The slurry storage barrel is connected to the base through the fixed column. The slurry storage barrel is located above the slurry mixing barrel. The stirring device includes a power mechanism fixed on the slurry storage barrel, a stirring shaft drivingly connected to the power output end of the power mechanism, a first stirring blade located in the slurry storage barrel, and a second stirring blade located in the slurry mixing barrel. The stirring shaft passes through the bottom of the slurry storage barrel and inserts into the slurry mixing barrel. The first stirring blade and the second stirring blade are both fixed on the stirring shaft, which improves the utilization rate of the stirring device and at the same time ensures the mixing quality of the slurry. However, the slurry prepared in its upper barrel is usually relatively large each time (such as a barrel of slurry or half a barrel of slurry), resulting in a certain lag between the timing of preparing the new slurry and the timing when the slurry ratio grade should be changed. At the end of the grouting stage, a barrel of slurry or half a barrel of slurry prepared may also have a lot left, causing waste.

[0004] Patent CN202010032606.9 discloses an automatic cement slurry mixing device and its control method, belonging to the field of water conservancy and hydropower equipment. A series of overflow pipes with different heights are provided on both the dilution water intake device and the cement thick slurry intake device of the automatic cement slurry mixing device of this patent, which is suitable for preparing cement slurries with different concentrations. In the control method of this patent, when it is detected that the liquid level of the cement slurry in the stirring device is lower than the preset value, the preparation of the cement slurry is started. According to the set cement ratio, the dilution water intake device measures the preset addition amount of dilution water into the cement stirring device, and the cement thick slurry intake device measures the preset addition amount of cement thick slurry into the cement stirring device, and stirs for a preset time to complete the preparation. It can be discharged through the discharge valve of the stirring device; when the liquid level in the stirring device is lower than the preset value, the next round of automatic batching is carried out, which can realize the automatic continuous operation of cement preparation and improve the speed and efficiency of slurry preparation at the construction site.

[0005] A cement slurry mixing device using a flow meter and a weighing method is disclosed in Patent CN201920529847.7, which includes an upper slurry mixing barrel, a lower stirring barrel, a hanging weighing device, a flow meter, a mixing pipe, a slurry mixing pipe, an outlet pipe, a support arm and a stirring mechanism; one end of the hanging weighing device is fixed on the support arm, and the other end is connected and fixed to the side of the upper slurry mixing barrel; the upper slurry mixing barrel is located above the lower stirring barrel, one end of the slurry mixing pipe is connected to the slurry mixing outlet, and the other end is placed inside the lower stirring barrel; one end of the mixing pipe is connected to the slurry inlet, and the other end is connected to a water inlet pipe and a thick slurry pipe, and the flow meter is arranged near the slurry inlet of the mixing pipe. Such a structure uses a non-contact method to measure the density of cement slurry, solves the problems of poor measurement effect and inability to measure at low liquid levels; adopts a double-layer barrel structure, enables slurry mixing and stirring to be carried out simultaneously, improves work efficiency, and is easy to clean the inside of the barrel.

[0006] A self-priming cement slurry mixing device is disclosed in Patent CN201220380313.0, which is applied to the field of cement squeezing and sealing construction in downhole operations of oil and gas development. The upper part of the jet suction funnel is a conical funnel, and the lower end of the jet suction funnel has an outer cylinder vertically connected to the funnel outlet. There is a nozzle inside the inlet end of the outer cylinder, and the outlet end of the outer cylinder at the bottom of the jet suction funnel is connected to a slurry feeding pipe; an electric turbine speed reducer stirrer is fixed on the upper end face cover plate of the elliptical tank, and an impeller is connected to the lower part of the electric turbine speed reducer stirrer; the lower part of the elliptical tank has an inclined bottom plate, and a sedimentation type slurry outlet is opened on the bottom of the inclined bottom plate of the elliptical tank. The slurry outlet is connected to an elbow and a gate valve, and a cylindrical mesh filter is fixed above the sedimentation type slurry outlet inside the elliptical tank. The effects are: accurate measurement of cement slurry can be achieved, pollution-free operation on site can be realized, full utilization of cement slurry can be achieved, labor intensity can be reduced, the success rate of plugging can be improved, construction time can be shortened, and the cost of dry cement can be reduced. Summary of the Invention

[0007] The purpose of the present invention is to provide a V-type automatic slurry mixing valve, which drives the density valve core to linearly move through a density servo motor. According to the density feedback signal, the opening degrees between the two reverse conical bodies of the density valve core and the outlets of the cement slurry raw material chamber and the water chamber are changed, so as to change the addition ratio of the cement slurry raw material amount and the water amount, and obtain a new mixed slurry with the required corresponding density or water-cement ratio. The flow servo motor drives the flow valve core to linearly move. According to the slurry volume level feedback signal, the opening degree between the conical body of the flow valve core and the outlet of the new mixed slurry chamber is changed, so as to change the flow rate of the new mixed slurry. The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects, which will be elaborated in detail below.

[0008] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0009] A V-shaped automatic pulp mixing valve, comprising a valve body, a density valve core and a flow valve core, wherein:

[0010] A newly prepared slurry chamber is provided inside the valve body.

[0011] Both ends of the valve body are also provided with a cement slurry raw material chamber and a water chamber.

[0012] Both the cement slurry raw material chamber and the water chamber are located above the newly prepared slurry chamber.

[0013] The density valve core is installed inside the valve body, between the cement slurry raw material chamber and the water chamber.

[0014] The density valve core is connected to a density servo motor.

[0015] The flow valve core is installed inside the newly prepared slurry chamber.

[0016] The flow valve core is connected to a flow servo motor.

[0017] The outlet of the newly prepared slurry chamber is connected to a grouting pipeline.

[0018] Optionally or preferably, two reverse cone bodies are provided on the density valve core.

[0019] Optionally or preferably, the two reverse cone bodies are respectively arranged at the outlets of the cement slurry raw material chamber and the water chamber.

[0020] Optionally or preferably, a cone body is provided on the flow valve core.

[0021] Optionally or preferably, the cone body of the flow valve core is installed at the outlet of the newly prepared slurry chamber.

[0022] Optionally or preferably, the cement slurry raw material chamber is connected to a raw material supply pipeline.

[0023] Optionally or preferably, the water chamber is connected to a water supply pipeline.

[0024] Based on the above technical solutions, the following technical effects can be achieved:

[0025] A V-shaped automatic slurry mixing valve provided by an embodiment of the present invention is applicable to grouting operations. In the present invention, a density servo motor drives a density valve core to linearly move. According to a density feedback signal, the opening degrees between two reverse conical bodies of the density valve core and the outlets of the cement slurry raw material chamber and the water chamber are changed, so as to change the adding ratio of the amount of cement slurry raw material and the amount of water, and a new mixed slurry with a required corresponding density or water-cement ratio is obtained. A flow servo motor drives a flow valve core to linearly move. According to a slurry volume feedback signal, the opening degree between the conical body of the flow valve core and the outlet of the new mixed slurry chamber is changed, so as to change the flow rate of the new mixed slurry. It can realize the real-time and appropriate preparation of the amount of cement slurry required during grouting (characteristic parameters are density and flow rate), meet the real-time needs of slurry ratio level transformation, reduce cement waste, and at the same time reduce the occupation of site space. It solves the technical problem that the slurry prepared during the end stage of grouting is prone to remain and cause waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0027] Figure 1 It is a schematic structural diagram of the present invention;

[0028] In the figure: 1. Cement slurry raw material chamber; 2. Density valve core; 3. Water chamber; 4. Density servo motor; 5. Flow valve core; 6. Flow servo motor; 7. New mixed slurry chamber; 8. Valve body; 201. Reverse conical body; 501. Conical body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0031] Embodiment 1:

[0032] As Figure 1 shown:

[0033] This embodiment provides a V-type automatic pulp mixing valve, which includes a valve body 8, a density valve core 2 and a flow valve core 5; wherein:

[0034] A newly prepared slurry chamber 7 is provided inside the valve body,

[0035] Both ends of the valve body are also provided with a cement slurry raw material chamber 1 and a water chamber 3,

[0036] Both the cement slurry raw material chamber 1 and the water chamber 3 are located above the newly prepared slurry chamber 7,

[0037] The density valve core 2 is installed inside the valve body 8 and is located between the cement slurry raw material chamber 1 and the water chamber 3,

[0038] The density valve core 2 is connected to a density servo motor 4,

[0039] The flow valve core 5 is installed inside the newly prepared slurry chamber 7,

[0040] The flow valve core 5 is connected to a flow servo motor 6,

[0041] The outlet of the newly prepared slurry chamber 7 is connected to a grouting pipeline.

[0042] In this embodiment, two reverse cone bodies 201 are provided on the density valve core 2.

[0043] In this embodiment, the two reverse cone bodies 201 are respectively arranged at the outlets of the cement slurry raw material chamber 1 and the water chamber 3.

[0044] In this embodiment, a cone body 501 is provided on the flow valve core 5.

[0045] In this embodiment, the cone body 501 of the flow valve core 5 is installed at the outlet of the newly prepared slurry chamber 7.

[0046] In this embodiment, the cement slurry raw material chamber 1 is connected to a raw material supply pipeline.

[0047] In this embodiment, the water chamber 3 is connected to a water supply pipeline.

[0048] In this embodiment, both the density servo motor 4 and the flow servo motor 6 are connected to a controller, and the controller is also connected to a liquid level sensor.

[0049] In this embodiment, the liquid level sensor monitors the slurry level in real time, feeds back a signal to the controller, and controls the action of the flow servo motor, thereby changing the opening degree between the cone body 501 of the flow valve core 5 and the outlet of the newly prepared slurry chamber 7, and correspondingly changing the flow rate of the new slurry to meet the required amount of new slurry.

[0050] This embodiment has the following advantages:

[0051] 1. The density servo motor 4 drives the density valve core 2 to linearly move. According to the density feedback signal, the opening degree between the two reverse conical bodies 201 of the density valve core 2 and the outlets of the cement slurry original slurry chamber 1 and the water chamber 3 is changed, so as to change the addition ratio of the original cement slurry amount and the water amount, and obtain a newly prepared slurry with the required corresponding density or water-cement ratio.

[0052] 2. It can realize the real-time and appropriate preparation of the required amount of cement slurry during grouting, meet the real-time needs of slurry ratio grade transformation, and reduce cement waste.

[0053] 3. Reduce the occupation of site space.

[0054] Embodiment 2:

[0055] This embodiment provides a V-shaped automatic slurry mixing valve, which includes a valve body 8, a density valve core 2 and a flow valve core 5; among them:

[0056] A newly prepared slurry chamber 7 is provided inside the valve body.

[0057] The two ends of the valve body are also provided with a cement slurry original slurry chamber 1 and a water chamber 3.

[0058] Both the cement slurry original slurry chamber 1 and the water chamber 3 are located at the upper end of the newly prepared slurry chamber 7.

[0059] The density valve core 2 is installed inside the valve body 8, between the cement slurry original slurry chamber 1 and the water chamber 3.

[0060] The density valve core 2 is connected with a density servo motor 4.

[0061] The flow valve core 5 is installed inside the newly prepared slurry chamber 7.

[0062] The flow valve core 5 is connected with a flow servo motor 6.

[0063] The outlet of the newly prepared slurry chamber 7 is connected to the grouting pipeline.

[0064] In this embodiment, two reverse conical bodies 201 are provided on the density valve core 2.

[0065] In this embodiment, the two reverse conical bodies 201 are respectively arranged at the outlets of the cement slurry original slurry chamber 1 and the water chamber 3.

[0066] In this embodiment, a conical body 501 is provided on the flow valve core 5.

[0067] In this embodiment, the conical body 501 of the flow valve core 5 is installed at the outlet of the newly prepared slurry chamber 7.

[0068] In this embodiment, the cement slurry original slurry chamber 1 is connected with an original slurry supply pipeline.

[0069] In this embodiment, the sump chamber 3 is connected to the water supply pipeline.

[0070] In this embodiment, both the density servo motor 4 and the flow servo motor 6 are connected to the controller, and the controller is also connected to a liquid level sensor.

[0071] In this embodiment, the liquid level sensor monitors the slurry level in real time and feeds back a signal to the controller, and the staff manually adjusts the water-cement ratio.

[0072] This embodiment has the following advantages:

[0073] 1. Low cost and flexible use;

[0074] 2. It can realize the real-time and appropriate preparation of the required specific gravity of cement slurry during grouting, meet the real-time needs of slurry specific gravity transformation, and reduce cement waste;

[0075] 3. Reduce the occupation of site space.

[0076] Embodiment 3:

[0077] This embodiment provides a V-shaped automatic slurry mixing valve, which includes a valve body 8, a density valve core 2 and a flow valve core 5; wherein:

[0078] A newly prepared slurry chamber 7 is provided inside the valve body,

[0079] Both ends of the valve body are also provided with a cement slurry raw material chamber 1 and a water chamber 3,

[0080] Both the cement slurry raw material chamber 1 and the water chamber 3 are located above the newly prepared slurry chamber 7,

[0081] The density valve core 2 is installed inside the valve body 8, between the cement slurry raw material chamber 1 and the water chamber 3,

[0082] The density valve core 2 is connected to a density servo motor 4,

[0083] The flow valve core 5 is installed inside the newly prepared slurry chamber 7,

[0084] The flow valve core 5 is connected to a flow servo motor 6,

[0085] The outlet of the newly prepared slurry chamber 7 is connected to the grouting pipeline.

[0086] In this embodiment, two reverse cone bodies 201 are provided on the density valve core 2.

[0087] In this embodiment, the two reverse cone bodies 201 are respectively arranged inside the outlet of the cement slurry raw material chamber 1 and inside the outlet of the water chamber 3.

[0088] In this embodiment, a cone body 501 is provided on the flow control valve core 5.

[0089] In this embodiment, the cone body 501 of the flow control valve core 5 is installed at the outlet of the newly prepared slurry bin chamber 7.

[0090] In this embodiment, the original cement slurry bin chamber 1 is connected with an original slurry supply pipeline.

[0091] In this embodiment, the water bin chamber 3 is connected with a water supply pipeline.

[0092] In this embodiment, both the density servo motor 4 and the flow servo motor 6 are connected to the controller, and the controller is also connected with a liquid level sensor.

[0093] In this embodiment, the liquid level sensor monitors the slurry level in real time, and feeds back a signal to the controller to control the operation of the flow servo motor, thereby changing the opening degree between the cone body 501 of the flow control valve core 5 and the outlet of the newly prepared slurry bin chamber 7, and correspondingly changing the flow rate of the new slurry to meet the requirement of the new slurry demand.

[0094] This embodiment has the following advantages:

[0095] 1. The density servo motor 4 drives the density control valve core 2 to linearly move. According to the density feedback signal, the opening degree between the two reverse cone bodies 201 of the density control valve core 2 and the outlets of the original cement slurry bin chamber 1 and the water bin chamber 3 is changed, thereby changing the addition ratio of the original cement slurry amount and the water amount to obtain the newly prepared slurry with the required corresponding density or water-cement ratio.

[0096] 2. It can realize the real-time and appropriate preparation of the required cement slurry amount during grouting, meet the real-time need of slurry ratio grade transformation, and reduce cement waste.

[0097] 3. Reduce the occupation of site space.

Claims

1. A V-type automatic slurry mixing valve, characterized in that: it includes a valve body (8), a density valve core (2) and a flow valve core (5); among which: a newly prepared slurry chamber (7) is provided inside the valve body, cement slurry original slurry chambers (1) and a water chamber (3) are further provided at both ends of the valve body, both the cement slurry original slurry chamber (1) and the water chamber (3) are located above the newly prepared slurry chamber (7), the density valve core (2) is installed inside the valve body (8), between the cement slurry original slurry chamber (1) and the water chamber (3), the density valve core (2) is connected with a density servo motor (4), the flow valve core (5) is installed inside the newly prepared slurry chamber (7), the flow valve core (5) is connected with a flow servo motor (6), the outlet of the newly prepared slurry chamber (7) is connected to a grouting pipeline; two reverse cone bodies (201) are provided on the density valve core (2); the two reverse cone bodies (201) are respectively arranged at the outlets of the cement slurry original slurry chamber (1) and the water chamber (3); a cone body (501) is provided on the flow valve core (5).

2. The V-type automatic slurry mixing valve according to claim 1, characterized in that: the cone body (501) of the flow valve core (5) is installed at the outlet of the newly prepared slurry chamber (7).

3. The V-type automatic slurry mixing valve according to claim 1, characterized in that: the cement slurry original slurry chamber (1) is connected with an original slurry supply pipeline.

4. The V-type automatic slurry mixing valve according to claim 1, characterized in that: the water chamber (3) is connected with a water supply pipeline.

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